<template>
    <div class="login_container">
      <el-row>
        <el-col :span="12" :xs="0"></el-col>
        <el-col :span="12" :xs="24">
          <!-- 登录的表单 -->
          <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
            <h1>Hello</h1>
            <h2>欢迎来到硅谷甄选</h2>
            <el-form-item prop="username">
              <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
            </el-form-item>
            <el-form-item prop="password">
              <el-input type="password" :prefix-icon="Lock" v-model="loginForm.password" show-password></el-input>
            </el-form-item>
            <el-form-item>
              <el-button :loading="loading" class="login_btn" type="primary" size="default" @click="login">登录</el-button>
            </el-form-item>
          </el-form>
        </el-col>
      </el-row>
    </div>
  </template>
  
  <script setup lang="ts">
  import { User, Lock } from '@element-plus/icons-vue';
  import { reactive, ref } from 'vue';
  import { useRouter, useRoute } from 'vue-router';
  import { ElNotification } from 'element-plus';
  //引入获取当前时间的函数
//   import { getTime } from '@/utils/time';
  //引入用户相关的小仓库
//   import useUserStore from "@/store/modules/user";
//   let useStore = useUserStore();
  //获取el-form组件
  let loginForms = ref();
  //获取路由器
  let $router = useRouter();
  //路由对象
  let $route = useRoute();
  //定义变量控制按钮加载效果
  let loading = ref(false);
  //收集账号与密码的数据
  let loginForm = reactive({ username: 'admin', password: 'atguigu123' });
  //登录按钮回调
  const login = async () => {
    //保证全部表单相校验通过再发请求
    await loginForms.value.validate();
    //加载效果:开始加载
    loading.value = true;
    //点击登录按钮以后干什么?
    //通知仓库发登录请求
    //请求成功->首页展示数据的地方
    //请求失败->弹出登录失败信息
    try {
      //保证登录成功
      await useStore.userLogin(loginForm);
      //编程式导航跳转到展示数据首页
      //判断登录的时候,路由路径当中是否有query参数，如果有就往query参数挑战，没有跳转到首页
      let redirect: any = $route.query.redirect;
      $router.push({ path: redirect || '/' });
      //登录成功提示信息
      ElNotification({
        type: 'success',
        message: '欢迎回来',
        title: `HI,${getTime()}好`
      });
      //登录成功加载效果也消失
      loading.value = false;
    } catch (error) {
      //登录失败加载效果消息
      loading.value = false;
      //登录失败的提示信息
      ElNotification({
        type: 'error',
        message: (error as Error).message
      })
    }
  }
  //自定义校验规则函数
  const validatorUserName = (rule: any, value: any, callback: any) => {
    //rule:即为校验规则对象
    //value:即为表单元素文本内容
    //函数:如果符合条件callBack放行通过即为
    //如果不符合条件callBack方法,注入错误提示信息
    if (value.length >= 5) {
      callback();
    } else {
      callback(new Error('账号长度至少五位'));
    }
  }
  
  const validatorPassword = (rule: any, value: any, callback: any) => {
    if (value.length >= 6) {
      callback();
    } else {
      callback(new Error('密码长度至少六位'));
    }
  }
  
  //定义表单校验需要配置对象
  const rules = {
    //规则对象属性:
    //required,代表这个字段务必要校验的
    //min:文本长度至少多少位
    //max:文本长度最多多少位
    //message:错误的提示信息
    //trigger:触发校验表单的时机 change->文本发生变化触发校验,blur:失去焦点的时候触发校验规则
    username: [
      // { required: true, min: 6, max: 10, message: '账号长度至少六位', trigger: 'change' }
      { trigger: 'change', validator: validatorUserName }
    ],
    password: [
      // { required: true, min: 6, max: 15, message: '密码长度至少6位', trigger: 'change' }
      { trigger: 'change', validator: validatorPassword }
    ]
  }
  </script>
  <style scoped lang="scss">
  .login_container {
    width: 100%;
    height: 100vh;
    background: url('@/assets/images/background.jpg') no-repeat;
    background-size: cover;
  
    .login_form {
      position: relative;
      width: 80%;
      top: 30vh;
      background: url("@/assets/images/login_form.png") no-repeat;
      background-size: cover;
      padding: 40px;
  
      h1 {
        color: white;
        font-size: 40px;
      }
  
      h2 {
        font-size: 20px;
        color: white;
        margin: 20px 0px;
      }
  
      .login_btn {
        width: 100%;
      }
    }
  }
  </style>